Hanson's high strength taps are useful for any number of machining projects, threading the interior surface of a hole to correspond with the desired thread pitch of a given screw, bolt or other part. This bottom tap has a very slight chamfer (tapered cutting edge) that is 1 to 2 threads in length, followed by a continuous cutting edge that enables the tap to cut threads to the very bottom of a blind hole. Lacking a proper taper to successfully start into an untapped hole, the bottom tap is best used for cleaning up or elongating existing threads. Featuring a square drive head, the tap can be paired with a Hanson T-handle tap wrench (sold separately) for manual operation, or attached to a lathe or drill press for greater precision and speed.

Technical Information

Tap Types and Suggested Uses:

Bottom tap has a chamfer (taper at the end) that is 1 to 2 threads long. Use for threading close to the bottom of blind holes.

Plug tap has a chamfer that is 3 to 5 threads long. The most common chamfer for use by hand or for machine tapping
through blind holes.

Taper tap has a chamfer that is 7 to 10 threads long. Easier starting and requires less tapping torque because of the
number of working teeth. Also known as a starter tap.

All taps have a square drive head. Size of square and overall length of tap will vary by tap size.

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